This ammo is manufactured by Industrias Tecnos S.A. De C.V. - they were established in Mexico in 1961 by Remington - and is premium quality ammo. Sold under their Aguila (Eagle) brand, Industrias Tecnos are manufacturers of ammo for the Mexican military and police forces and also sell ammo in the Middle East, South America, and Europe.This ammo is brass-cased, non-corrosive